add_filter( 'cybersource_add_signed_field_names', 'cybersource_add_mdd_fields' );

global $woocommerce;

$consumer_id = get_current_user_id();
$previous_customer = ( $consumer_id == 0 ? 'NO' : 'YES' );


// Get Cart Items
$cart_items = $woocommerce->cart->get_cart();

$cb_items = array();

if( ! empty( $cart_items ) ){

    if( count($cart_items) == 1 ){

        $x = 0;
        foreach( $cart_items  as $values ){

            if( $values[ 'product_id' ] ){
                $product = new WC_Product( $values['product_id']);
                $products_cats = $product->get_category_ids();
            } else {
                $product = new WC_Product( $values['variation_id']);
                $products_cats = $product->get_category_ids();
            }


            $_product = $values['data']->post;

            $cb_items[ 'merchant_defined_data3' ] = substr($_product->post_title,0,100);

            if( is_array($products_cats) && ! empty($products_cats)){
                $c = array();
                foreach ($products_cats as $value) {
                    $c[] = get_cat_name( $value );
                }

                $products_cats = implode( ',', $c );
            } else {
                $products_cats = '';
            }

            $cb_items[ 'merchant_defined_data4' ] = $products_cats;

            $x++;
        }

    } else {


        $x = 0;
        foreach( $cart_items  as $values ){

            if( $values[ 'product_id' ] ){
                $product = new WC_Product( $values['product_id']);
                $products_cats = $product->get_category_ids();
            } else {
                $product = new WC_Product( $values['variation_id']);
                $products_cats = $product->get_category_ids();
            }


            $_product               = $values['data']->post;

            $mdd_product[ 'name' ][]  =  substr($_product->post_title,0,100);

            if( ! empty($products_cats) && is_array($products_cats)){
                foreach ( $products_cats as $key => $value) {
                    $mdd_product[ 'cats' ][]  = $value;
                }
            } else {
                $mdd_product[ 'cats' ]  = $products_cats;
            }


            $x++;
        }



        if( ! empty( $mdd_product[ 'name' ] ) && is_array($mdd_product[ 'name' ])){
            $cb_items[ 'merchant_defined_data3' ] = implode( ',', $mdd_product[ 'name' ] );
        }

        if( ! empty($mdd_product[ 'cats' ]) && is_array($mdd_product[ 'cats' ] )){
            $c = array();

            foreach ($mdd_product[ 'cats' ] as  $value) {
                $c[] = get_cat_name( $value );
            }
            $cb_items[ 'merchant_defined_data4' ] = implode( ',', $c);
        }

    }

}


$shipping_class = array_values($cart_items);


if( ! empty( $shipping_class)){
    $shipping_class = $shipping_class[0]['data']->get_shipping_class();

    if( empty($shipping_class) ){
            $shipping_class = WC()->session->get('chosen_shipping_methods');
            $shipping_class = $shipping_class[0];
    }



} else {
    $shipping_class = 'No shipping method available';
}

$mdd1 =  array(
        'consumer_id'             =>  $consumer_id, // Consumer ID
        'merchant_defined_data1'  => __( 'WC', 'woocommerce'  ),  // Chanel of Operation
        'merchant_defined_data2'  => __( 'YES', 'woocommerce'  ), // 3D secure registration
        'merchant_defined_data5'  =>  $previous_customer, // Previous Customer
        'merchant_defined_data6'  =>  $shipping_class, // Shipping Method
        'merchant_defined_data7'  =>  WC()->cart->get_cart_contents_count(), // Number of Items Sold
        'merchant_defined_data8'  =>  $woocommerce->customer->get_country(), // Product Shipping Country
        'merchant_defined_data20' => __( 'NO', 'woocommerce'  ), // VIP Customer

    );

$mdd = array_merge( $mdd1, $cb_items );

return $mdd;